Harry Fletcher is a market analyst at an automobile firm. He forms a hypothesis that an increase in advertising will increase the demand for the​ firm's cars. Which of the​ following, if​ true, may result in the rejection of his​ hypothesis?

A. Automotive franchise establishments are expected to report an annual increase of 4 percent this year.
B. The demand for car accessories has significantly increased in the past few years.
C. The demand for sedans has traditionally been higher than the demand for hatchbacks.
D. As air travel picks​ up, demand for car rentals is also expected to increase.
E. Car buyers base their purchasing decisions on independent reviews.